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Merge branch 'net-pse-pd-add-tps23881b-support'

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Thomas Wismer says:

====================
net: pse-pd: Add TPS23881B support

This patch series aims at adding support for the TI TPS23881B PoE
PSE controller.
====================

Link: https://patch.msgid.link/20251029212312.108749-1-thomas@wismer.xyz
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski 2025-10-31 17:56:33 -07:00
commit 29f7ae9eba
2 changed files with 55 additions and 15 deletions
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1
Documentation/devicetree/bindings/net/pse-pd/ti,tps23881.yaml
View File

@ -16,6 +16,7 @@ properties:
compatible:
enum:
- ti,tps23881
- ti,tps23881b
reg:
maxItems: 1

69
drivers/net/pse-pd/tps23881.c
View File

@ -55,8 +55,6 @@
#define TPS23881_REG_TPON BIT(0)
#define TPS23881_REG_FWREV 0x41
#define TPS23881_REG_DEVID 0x43
#define TPS23881_REG_DEVID_MASK 0xF0
#define TPS23881_DEVICE_ID 0x02
#define TPS23881_REG_CHAN1_CLASS 0x4c
#define TPS23881_REG_SRAM_CTRL 0x60
#define TPS23881_REG_SRAM_DATA 0x61
@ -1012,8 +1010,28 @@ static const struct pse_controller_ops tps23881_ops = {
.pi_get_pw_req = tps23881_pi_get_pw_req,
};
static const char fw_parity_name[] = "ti/tps23881/tps23881-parity-14.bin";
static const char fw_sram_name[] = "ti/tps23881/tps23881-sram-14.bin";
struct tps23881_info {
u8 dev_id; /* device ID and silicon revision */
const char *fw_parity_name; /* parity code firmware file name */
const char *fw_sram_name; /* SRAM code firmware file name */
};
enum tps23881_model {
TPS23881,
TPS23881B,
};
static const struct tps23881_info tps23881_info[] = {
[TPS23881] = {
.dev_id = 0x22,
.fw_parity_name = "ti/tps23881/tps23881-parity-14.bin",
.fw_sram_name = "ti/tps23881/tps23881-sram-14.bin",
},
[TPS23881B] = {
.dev_id = 0x24,
/* skip SRAM load, ROM provides Clause 145 hardware-level support */
},
};
struct tps23881_fw_conf {
u8 reg;
@ -1085,16 +1103,17 @@ static int tps23881_flash_sram_fw_part(struct i2c_client *client,
return ret;
}
static int tps23881_flash_sram_fw(struct i2c_client *client)
static int tps23881_flash_sram_fw(struct i2c_client *client,
const struct tps23881_info *info)
{
int ret;
ret = tps23881_flash_sram_fw_part(client, fw_parity_name,
ret = tps23881_flash_sram_fw_part(client, info->fw_parity_name,
tps23881_fw_parity_conf);
if (ret)
return ret;
ret = tps23881_flash_sram_fw_part(client, fw_sram_name,
ret = tps23881_flash_sram_fw_part(client, info->fw_sram_name,
tps23881_fw_sram_conf);
if (ret)
return ret;
@ -1412,6 +1431,7 @@ static int tps23881_setup_irq(struct tps23881_priv *priv, int irq)
static int tps23881_i2c_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
const struct tps23881_info *info;
struct tps23881_priv *priv;
struct gpio_desc *reset;
int ret;
@ -1422,6 +1442,10 @@ static int tps23881_i2c_probe(struct i2c_client *client)
return -ENXIO;
}
info = i2c_get_match_data(client);
if (!info)
return -EINVAL;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
@ -1440,7 +1464,7 @@ static int tps23881_i2c_probe(struct i2c_client *client)
* to Load TPS2388x SRAM and Parity Code over I2C" (Rev E))
* indicates we should delay that programming by at least 50ms. So
* we'll wait the entire 50ms here to ensure we're safe to go to the
* SRAM loading proceedure.
* SRAM loading procedure.
*/
msleep(50);
}
@ -1449,20 +1473,27 @@ static int tps23881_i2c_probe(struct i2c_client *client)
if (ret < 0)
return ret;
if (FIELD_GET(TPS23881_REG_DEVID_MASK, ret) != TPS23881_DEVICE_ID) {
if (ret != info->dev_id) {
dev_err(dev, "Wrong device ID\n");
return -ENXIO;
}
ret = tps23881_flash_sram_fw(client);
if (ret < 0)
return ret;
if (info->fw_sram_name) {
ret = tps23881_flash_sram_fw(client, info);
if (ret < 0)
return ret;
}
ret = i2c_smbus_read_byte_data(client, TPS23881_REG_FWREV);
if (ret < 0)
return ret;
dev_info(&client->dev, "Firmware revision 0x%x\n", ret);
if (ret == 0xFF) {
dev_err(&client->dev, "Device entered safe mode\n");
return -ENXIO;
}
dev_info(&client->dev, "Firmware revision 0x%x%s\n", ret,
ret == 0x00 ? " (ROM firmware)" : "");
/* Set configuration B, 16 bit access on a single device address */
ret = i2c_smbus_read_byte_data(client, TPS23881_REG_GEN_MASK);
@ -1498,13 +1529,21 @@ static int tps23881_i2c_probe(struct i2c_client *client)
}
static const struct i2c_device_id tps23881_id[] = {
{ "tps23881" },
{ "tps23881", .driver_data = (kernel_ulong_t)&tps23881_info[TPS23881] },
{ "tps23881b", .driver_data = (kernel_ulong_t)&tps23881_info[TPS23881B] },
{ }
};
MODULE_DEVICE_TABLE(i2c, tps23881_id);
static const struct of_device_id tps23881_of_match[] = {
{ .compatible = "ti,tps23881", },
{
.compatible = "ti,tps23881",
.data = &tps23881_info[TPS23881]
},
{
.compatible = "ti,tps23881b",
.data = &tps23881_info[TPS23881B]
},
{ },
};
MODULE_DEVICE_TABLE(of, tps23881_of_match);